预览加载中,请您耐心等待几秒...
1/2
2/2

在线预览结束,喜欢就下载吧,查找使用更方便

如果您无法下载资料,请参考说明:

1、部分资料下载需要金币,请确保您的账户上有足够的金币

2、已购买过的文档,再次下载不重复扣费

3、资料包下载后请先用软件解压,在使用对应软件打开

OPE和PBM分子在石墨表面自组装结构的STM研究 Title:STMStudyofSelf-AssemblyStructuresofOPEandPBMMoleculesonGraphiteSurface Abstract: Theunderstandingofself-assemblyprocessesonsolidsurfacesiscrucialforthedesignandfabricationoffunctionalnanostructures.Inthisstudy,weinvestigatetheself-assemblystructuresofOligo(phenyleneethynylene)(OPE)andPolymethylbenzene(PBM)moleculesonagraphitesurfaceusingScanningTunnelingMicroscopy(STM).Theinteractionsbetweenthemoleculesandthesurface,aswellastheroleofintermolecularforces,areanalyzedanddiscussed.Ourresultsprovidevaluableinsightsintounderstandingtheprinciplesofself-assemblyandmaycontributetothedevelopmentofadvancednanoscalematerials. Introduction: Self-assemblyisafundamentalprocessinnanoscalescienceandengineering,governingtheformationofcomplexnanostructureswithspecificfunctionalities.Inrecentyears,thestudyofself-assemblyonsolidsurfaceshasreceivedsignificantattentionduetoitspotentialapplicationsinnanodevices,molecularelectronics,andsurface-enhancedspectroscopy.OPEandPBMmoleculesarebothwidelyusedinthesefieldsduetotheiruniqueelectronicandopticalproperties. Methods: Theexperimentswereperformedusingalow-temperatureSTMsystemoperatinginultra-highvacuumconditions.Agraphitesurfacewaspreparedbyrepeatedcyclesofsputteringandannealingundercontrolledconditions.OPEandPBMmoleculesweresublimatedontothesamplesurfaceusingaresistivelyheatedcrucible.STMimageswereacquiredinconstantcurrentmode,andtheobtaineddatawereanalyzedusingImageJsoftware. ResultsandDiscussion: Theself-assemblyofOPEandPBMmoleculesonthegraphitesurfaceresultedintheformationofvariousnanostructures,whichwerecharacterizedusingSTM.Theprimarydrivingforcebehindtheformationofthesestructuresistheintermolecularinteractionsbetweenadjacentmoleculesandthemolecule-substrateinteractions.OPEmoleculeswerefoundtoformlinearchainsorvariousgeometricpatterns,dependingonthedepositionconditions,whilePBMmoleculestendtoformlargeislandsordendriticstructures. Thenatureofintermolecularinteractions,includingvanderWaalsforces,hydrogenbon